NF EN ISO 1973
Textile fibres. Determination of linear density. Gravimetric method and vibroscope method.
La présente norme spécifie une méthode de détermination de la masse par unité de longueur des fibres textiles (masse linéique), en mesurant sa fréquence de résonance au moyen d'un vibroscope. Elle est particulièrement interéssante dans le cas des fibres synthétiques, tout en étant applicable avec moins de précision aux fibres de coton et de laine.
This document specifies a gravimetric method and a vibroscope method for the determination of the linear density of textile fibres applicable respectively to: a) bundles of fibres; b) individual fibres. Useful data can be obtained on man-made fibres and, with less precision, on natural fibres. This document only applies to fibres which can be kept straight and, in the case of bundles, parallel, during test preparation. It is properly applicable when the fibres are readily freed of crimp. The methods in this document are not applicable to tapered fibres. The vibroscope method is not always applicable to hollow and flat (ribbon-like) fibres.
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